Hi
I am experimenting Xen with my embedded system environment and got a
question in next_module() function.
*static paddr_t __init next_module(paddr_t s, paddr_t *end)*
*{*
* struct bootmodules *mi = &bootinfo.modules;*
* paddr_t lowest = ~(paddr_t)0;*
* int i;*
* for ( i = 0; i < mi->nr_mods; i++ )*
* {*
* paddr_t mod_s = mi->module[i].start;*
* paddr_t mod_e = mod_s + mi->module[i].size;*
* if ( !mi->module[i].size )*
* continue;*
* if ( mod_s < s )*
* continue;*
* if ( mod_s > lowest )*
* continue;*
* if ( mod_s > *end )*
* continue;*
* lowest = mod_s;*
* *end = min(*end, mod_e);*
* }*
* return lowest;*
*}*
The job of next_module() function is excluding module exist RAM range
between s and *end and finding empty space which can be heap space.
But Its function does not work if module range is bigger than s and *end
range.
(Case when module range is mod_s <= s and mod_e >= *end)
* if ( mod_s < s )*
* continue;*
Above condition passes the case and xen consider range s and *end is free
space.
Is it expected result or mistake?
Thank you.
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